<template>
	<view>
    <!-- 搜索框 -->
		<view class="search-box">
		  <!-- 使用 uni-ui 提供的搜索组件 -->
		  <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
    <!-- 建议列表 -->
    <view class="sugg-list" v-if="searchResult.length !== 0">
      <view class="sugg-item" v-for="(item, i) in searchResult" :key="i" @click="gotoDetail(item.goods_id)">
        <view class="goods-name">{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 历史记录 -->
    <view class="history-box" v-else>
      <!-- 标题区域 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
      </view>
      <!-- 列表区域 -->
      <view class="history-list">
        <uni-tag :text="item" v-for="(item, i) in historyList" :key="i" @click="gotoGoodList(item)"></uni-tag>
      </view>
    </view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
        keyWord:'',
        searchResult:[],
        historyList:['小米','华为','Apple']
			};
		},
    methods:{
      input(e) {
        clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.keyWord = e.value
          this.getSearchResult()
          // console.log(this.keyWord)
        },500)
      },
      async getSearchResult() {
        if(this.keyWord === '') {
          this.searchResult = []
          return
        }
        const {data: res} = await uni.$http.get('/api/public/v1/goods/qsearch', {query: this.keyWord})
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchResult = res.message
        this.saveHistroy()
      },
      gotoDetail(goods_id) {
        uni.navigateTo({
          // 指定详情页面的 URL 地址，并传递 goods_id 参数
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
        })
      },
      saveHistroy() {
          // 关键词不在历史记录中 直接插入
          if(this.historyList.indexOf(this.keyWord) === -1) {
            this.historyList.unshift(this.keyWord)
          } else {
            // 关键词在历史记录中 先删除再插入
            const delIndex = this.historyList.indexOf(this.keyWord)
            this.historyList.splice(delIndex,1)
            this.historyList.unshift(this.keyWord)
          }
          // setStorageSync方法将搜索记录持久化到本地
          uni.setStorageSync('keyWord',JSON.stringify(this.historyList))
      },
      cleanHistory() {
        this.historyList = []
        uni.setStorageSync('kw', '[]')
      },
      gotoGoodList(keyWord) {
        uni.navigateTo({
          url:'/subpackge/goods_lists/goods_lists?query=' + keyWord
        })
      }
    },
    onLoad() {
      // getStorageSync方法从本地取搜索记录
      this.historyList = JSON.parse(uni.getStorageSync('keyWord') || '[]')
    }
	}
</script>

<style lang="scss">
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}


</style>
